Abstract
All three pigments crystallise in the triclinic system, space group P1¯, and with one molecule in the unit cell so that all molecules have crystallographic Ci symmetry. The molecules exist in the bisketohydrazone tautomeric form. The intramolecular hydrogen bonding normally associated with this structural arrangement is observed, but there is no intermolecular hydrogen bonding. The molecules are not quite planar, but deviate from planarity by only a few degrees of torsional bond rotations. In each structure the molecules pack together in inclined interleaved stacks so that the ketohydrazonoarylamide groups lie above and below one another in antiparallel arrangements. The colour and technical performance of the pigments are discussed in relation to the structural details. © 2002 Elsevier Science Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 79-89 |
Number of pages | 11 |
Journal | Dyes and Pigments |
Volume | 55 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - Nov 2002 |
Keywords
- C. I. Pigment Yellow 13
- C. I. Pigment Yellow 14
- C. I. Pigment Yellow 63
- Diarylide yellow
- Disazo pigment
- Disazoacetoacetanilide
- Ketohydrazone
- X-ray crystallography